Web Platforms & SaaS
A SaaS product that converts is engineering, not marketing in disguise. It's multi-tenant from day one, scales without a rewrite, ships features without breaking yesterday's customers, and turns usage into revenue without a spreadsheet behind the scenes. Critonyx is the SaaS partnership for founders who already know that — and want to build accordingly.
The MVP got built quickly — by someone who optimised for the demo, not the second year. Six months in, every new feature breaks an old one. Onboarding works for some customers, falls apart for others, and nobody quite knows why. The database is a graveyard of tenant data tangled together. The team is afraid to refactor because nothing is documented and nothing is tested.
We've seen this in dozens of cap tables. Founders who raised on a working product can't ship the second version. The codebase that got them to seed becomes the thing that stops them at Series A.
We exist for the founders who refuse to spend their next round paying down debt the previous build created.
Our commitments
Most SaaS products are built single-tenant and "made multi-tenant later." That migration is almost always a rewrite. We architect for tenancy from line one — schema, auth, billing, data isolation — because retrofitting it costs more than building it right the first time.
Everything else is replaceable. Front-ends get redesigned, frameworks come and go, infrastructure gets migrated. The data model is what your business becomes. We spend disproportionate time on it before writing application code — because every shortcut here compounds into pain later.
Milestone-based pricing, signed before kickoff.
See How we price →
Real multi-tenant architecture, real billing integration, real onboarding logic — shipped in weeks, not quarters. Built so the next ten features don't break the first ten.
When the working product is also the bottleneck. We replace the load-bearing parts without taking the business down — strangler patterns, incremental migrations, zero-downtime cutovers.
The unsexy half of every SaaS company. The dashboards your support team uses, the back-office tools your finance team begs for, the data exports that close enterprise deals. Built fast, scoped tight.
When your product has to talk to Salesforce, NetSuite, Stripe, or whatever your customer's stack demands — built with the observability, retries, and audit logs that enterprise procurement actually checks for.
Account management, billing self-serve, usage dashboards, role-based access — the features that move support tickets into product.
The offer
A one-week structured engagement for SaaS founders who've already shipped, and want to know what's actually under the hood before the next round of investment. We audit the architecture, the data model, the test coverage, the deployment pipeline, and the parts of the codebase nobody wants to open.
You walk out with:
Most founders walk out either knowing they don't need a rewrite — or knowing exactly which 20% of the codebase is costing them 80% of the pain.
The framework
Tenancy model, data model, billing model, auth model. The four decisions that determine whether the product scales or stalls. We make them before any feature work begins.
Specialist SaaS engineers, weekly cadence, milestone-priced. We ship the platform, the features, the integrations — and the test coverage that lets you ship the next ones without us.
Long-term partnership for founders making the hard architecture calls — when to refactor, when to rewrite, when to leave it alone.
Once the product works, we scale it without the cost curve eating you alive. Tenant performance isolation, observability, capacity planning, incident response.
"They rebuilt the parts that mattered, left the parts that worked, and shipped a product I could actually take to Series A."
What happens next
Free. You describe the product, the stage, the friction.
One week. Written recommendation.
Most SaaS engagements have a working product in 6–10 weeks. Production-grade platforms in 12–16.
Ready to talk
If you're sitting on a product that's working but starting to crack — feature velocity dropping, customer issues piling up, the team afraid to touch the codebase — that's a signal, not a phase. Book a call. Thirty minutes. We'll tell you whether you're closer to a refactor or a rebuild, and what each path actually costs.